As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CA SIDE OXYGEN MASK FAILED TEST. FREE FLOWING AIR. NOT ABLE TO SHUT OFF / SELECTED CREW SUPPLY OFF TO STOP AIR FLOW. REMOVED AND REPLACED CA O2 MASK REF A319 AMM 35-12. OP CHECK NORMAL. NO LEAKS NOTED. RFID INDUCTION C/W. (LP: 9478930, AIRCRAFT WAS GROUNDED)